phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('d2f115a9c8b687a7d7cbf5a3c0b052c6', -1, 1511461094, 1511461094, '3650e3bd', -9, 0, 0)

Line : 187
File : sessions.php